/*
 * Copyright (C) 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System;
using UnityEngine;
using System.Collections.Generic;

namespace GooglePlayGames.OurUtils {
public static class Misc {
    public static bool BuffersAreIdentical(byte[] a, byte[] b) {
        if (a == b) {
            // not only identical but the very same!
            return true;
        }
        if (a == null || b == null) {
            // one of them is null, the other one isn't
            return false;
        }
        if (a.Length != b.Length) {
            return false;
        }
        for(int i = 0; i < a.Length; i++) {
            if (a[i] != b[i]) {
                return false;
            }
        }
        return true;
    }

    public static byte[] GetSubsetBytes(byte[] array, int offset, int length) {
        if (array == null) {
            throw new ArgumentNullException("array");
        }

        if (offset < 0 || offset >= array.Length) {
            throw new ArgumentOutOfRangeException("offset");
        }

        if (length < 0 || (array.Length - offset) < length) {
            throw new ArgumentOutOfRangeException("length");
        }

        if (offset == 0 && length == array.Length) {
            return array;
        }

        byte[] piece = new byte[length];
        Array.Copy(array, offset, piece, 0, length);
        return piece;
    }

    public static T CheckNotNull<T>(T value) {
        if (value == null) {
            throw new ArgumentNullException();
        }

        return value;
    }
}
}

